Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Potpourri/JohnWalsh.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1174-JohnWalsh.ps) >>/Users/jc/w/tmp/Tune-1174-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Potpourri/JohnWalsh.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-1174-JohnWalsh.abc 151 ABC music file with the extracted tune(s)
Tune-1174-JohnWalsh.ps 6 PostScript
Tune-1174-JohnWalsh.txt 151 Plain-text file with the extracted tune(s)
Tune-1174-get.log 4073 Log file, useful mostly for debugging
Tune-11740-AndersonsBudgetV1.abc 156 ABC music file with the extracted tune(s)
Tune-11740-AndersonsBudgetV1.ps 6 PostScript
Tune-11740-AndersonsBudgetV1.txt 156 Plain-text file with the extracted tune(s)
Tune-11740-get.log 13890 Log file, useful mostly for debugging
Tune-11741-PaulBackstrom-LfD.abc 157 ABC music file with the extracted tune(s)
Tune-11741-PaulBackstrom-LfD.txt 157 Plain-text file with the extracted tune(s)
Tune-11741-get.log 3332 Log file, useful mostly for debugging
Tune-11742-get.log 4632 Log file, useful mostly for debugging
Tune-11744-get.log 7904 Log file, useful mostly for debugging
Tune-11745-get.log 9340 Log file, useful mostly for debugging
Tune-11747-get.log 7429 Log file, useful mostly for debugging
Tune-11749-get.log 4167 Log file, useful mostly for debugging
These files should be available for 24 hours.